{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD814SD","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD814SD","canonicalUrl":"https://icboms.com/onsemi/FOD814SD","factsUrl":"https://icboms.com/api/mcp/products/FOD814SD","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD814SD, single-channel optoisolator, 5000Vrms isolation, AC/DC input, transistor output, 4-SMD gull wing package, -55°C to 105°C operating range.","salesMarkdown":"## What this opto does and where it fits The FOD814SD is a single-channel optoisolator from onsemi with a transistor output and a 5000Vrms isolation rating — the kind of spec you reach for when you need reinforced insulation between a mains-voltage domain and a low-voltage control circuit. This part accepts both AC and DC input, which suits zero-cross detection on a mains line or monitoring a universal-input power supply where polarity is not fixed. The operating temperature range of -55°C to 105°C pushes it beyond commercial-grade gear — think outdoor telecom cabinets, industrial motor drives, or battery-management systems that see thermal cycling. ## Key ratings that drive the BOM decision The current transfer ratio (CTR) spans 20% to 300% at a 1 mA forward current — a wide bin that gives you headroom for degraded LED output over life, but also means you should design the pull-up resistor for the minimum CTR to guarantee the output saturates at end of life. Vce saturation is 200 mV max — low enough to keep the logic-level output clean when driving a 3.3V or 5V CMOS input, but check the collector current: the 50 mA output rating limits direct drive of a relay coil or LED string without a buffer transistor. Rise and fall times are 4 µs and 3 µs typical — fine for mains-frequency isolation, but not for high-speed data or gate-drive feedback where a digital isolator or high-speed optocoupler is needed. ## Sourcing and lifecycle reality It is ROHS3 compliant, so no exemption paperwork needed for EU or California markets. Packaging options include Tape & Reel and Cut Tape — the reel suits volume pick-and-place; the cut tape works for prototypes or small-batch builds.","metaTitle":"FOD814SD Optoisolator 5000Vrms Transistor Output AC/DC","metaDescription":"FOD814SD onsemi optoisolator: 5000Vrms isolation, AC/DC input, transistor output, 4-SMD gull wing, -55°C to 105°C. Active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"AC, DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","lifecycle_stage":"eol_hot","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"200mV","Operating Temperature":"-55°C ~ 105°C","Rise / Fall Time (Typ)":"4µs, 3µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"300% @ 1mA","Current Transfer Ratio (Min)":"20% @ 1mA","Voltage - Forward (Vf) (Typ)":"1.2V","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.84","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.84000","currency":"USD"},{"qty":10,"price":"$0.55000","currency":"USD"},{"qty":100,"price":"$0.36040","currency":"USD"},{"qty":1000,"price":"$0.28452","currency":"USD"},{"qty":2000,"price":"$0.26555","currency":"USD"},{"qty":5000,"price":"$0.25607","currency":"USD"},{"qty":10000,"price":"$0.25227","currency":"USD"},{"qty":25000,"price":"$0.24658","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum collector current for FOD814SD?","answer":"50 mA continuous per channel. That is the absolute maximum — for reliable long-term operation, derate to 30-40 mA depending on ambient temperature and the thermal resistance of the 4-SMD package on your board."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD814SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD814SD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T20:07:08.208Z","lastPublished":"2026-07-17T20:07:08.208Z","indexable":true}}